Aclient has had extensive surgery on the gastrointestinal tract and has been started on total parenteral nutrition (tpn). the client tells the nurse, "i think i'm going crazy. i feel like i'm starving, and yet that bag is supposed to be feeding me." which is the best response from the nurse?

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

your answer should be c) enjoy!